ounce

n. unit of weight equal to 1/16 of a pound; unit of liquid measurement equal to 0.0284 of a litre; little bit, small amount; snow leopard, leopard-like feline with long thick white fur marked with dark splotches native to the mountain ranges of central Asia

The ounce (abbreviation: oz) is the name of a unit of mass in a number of different systems, including various systems of mass that form part of English units, Imperial units, and United States customary units. Its size can vary from system to system. The most commonly used ounces used today are the international avoirdupois ounce and the international troy ounce.
See more at Wikipedia.org...

Noun
1. a unit of apothecary weight equal to 480 grains or one twelfth of a pound
(synonym) troy ounce, apothecaries' ounce
(hypernym) apothecaries' unit, apothecaries' weight
(part-holonym) troy pound, apothecaries' pound
(part-meronym) pennyweight
2. a unit of weight equal to one sixteenth of a pound or 16 drams or 28.349 grams
(synonym) oz.
(hypernym) avoirdupois unit
(part-holonym) pound, lb
(part-meronym) dram
3. large feline of upland central Asia having long thick whitish fur
(synonym) snow leopard, Panthera uncia
(hypernym) big cat, cat
(member-holonym) Panthera, genus Panthera

(n.)
The twelfth part of a troy pound.
  

(n.)
Fig.: A small portion; a bit.
  

(n.)
A weight, the sixteenth part of a pound avoirdupois, and containing 437/ grains.
  

(n.)
A feline quadruped (Felis irbis, / uncia) resembling the leopard in size, and somewhat in color, but it has longer and thicker fur, which forms a short mane on the back. The ounce is pale yellowish gray, with irregular dark spots on the neck and limbs, and dark rings on the body. It inhabits the lofty mountain ranges of Asia. Called also once.
  

A measure of weight equal to 1/16th of a pound or, metrically, 28.35 grams. The abbreviation for ounce is oz. (An ounce of prevention is reputedly worth a pound of cure.)